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Production and characterization of a biosurfactant produced by Streptomyces sp. DPUA 1559 isolated from lichens of the Amazon region

Overview of attention for article published in Brazilian Journal of Medical and Biological Research, January 2018
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Title
Production and characterization of a biosurfactant produced by Streptomyces sp. DPUA 1559 isolated from lichens of the Amazon region
Published in
Brazilian Journal of Medical and Biological Research, January 2018
DOI 10.1590/1414-431x20176657
Pubmed ID
Authors

A.P.P. Santos, M.D.S. Silva, E.V.L. Costa, R.D. Rufino, V.A. Santos, C.S. Ramos, L.A. Sarubbo, A.L.F. Porto

Abstract

Surfactants are amphipathic compounds containing both hydrophilic and hydrophobic groups, capable to lower the surface or interfacial tension. Considering the advantages of the use of biosurfactants produced by microorganisms, the aim of this paper was to develop and characterize a biosurfactant produced by Streptomyces sp. DPUA1559 isolated from lichens of the Amazon region. The microorganism was cultured in a mineral medium containing 1% residual frying soybean oil as the carbon source. The kinetics of biosurfactant production was accompanied by reducing the surface tension of the culture medium from 60 to values around 27.14 mN/m, and by the emulsification index, which showed the efficiency of the biosurfactant as an emulsifier of hydrophobic compounds. The yield of the isolated biosurfactant was 1.74 g/L, in addition to the excellent capability of reducing the surface tension (25.34 mN/m), as observed from the central composite rotational design when the biosurfactant was produced at pH 8.5 at 28°C. The critical micelle concentration of the biosurfactant was determined as 0.01 g/mL. The biosurfactant showed thermal and pH stability regarding the surface tension reduction, and tolerance under high salt concentrations. The isolated biosurfactant showed no toxicity to the micro-crustacean Artemia salina, and to the seeds of lettuce (Lactuca sativa L.) and cabbage (Brassica oleracea L.). The biochemistry characterization of the biosurfactant showed a single protein band, an acid character and a molecular weight around 14.3 kDa, suggesting its glycoproteic nature. The results are promising for the industrial application of this new biosurfactant.

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Mendeley readers

The data shown below were compiled from readership statistics for 82 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 82 100%

Demographic breakdown

Readers by professional status Count As %
Student > Master 13 16%
Student > Ph. D. Student 10 12%
Student > Bachelor 8 10%
Student > Doctoral Student 8 10%
Researcher 7 9%
Other 15 18%
Unknown 21 26%
Readers by discipline Count As %
Agricultural and Biological Sciences 15 18%
Environmental Science 9 11%
Immunology and Microbiology 8 10%
Biochemistry, Genetics and Molecular Biology 6 7%
Chemical Engineering 4 5%
Other 10 12%
Unknown 30 37%